2151625 has 16 divisors (see below), whose sum is σ = 3070080. Its totient is φ = 1474800.

The previous prime is 2151623. The next prime is 2151629. The reversal of 2151625 is 5261512.

It is not a de Polignac number, because 2151625 - 2¹ = 2151623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2151596 and 2151605.

It is not an unprimeable number, because it can be changed into a prime (2151623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355 + ... + 2104.

It is an arithmetic number, because the mean of its divisors is an integer number (191880).

2^2151625 is an apocalyptic number.

2151625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2151625 is a deficient number, since it is larger than the sum of its proper divisors (918455).

2151625 is an equidigital number, since it uses as much as digits as its factorization.

2151625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481 (or 2471 counting only the distinct ones).

The product of its digits is 600, while the sum is 22.

The square root of 2151625 is about 1466.8418455989. The cubic root of 2151625 is about 129.0987965791.

The spelling of 2151625 in words is "two million, one hundred fifty-one thousand, six hundred twenty-five".